Recent results of the test of the first Long Nb3Sn Quadrupole by LARP

by Giorgio Ambrosio (Fermilab)

Tuesday 20 Jul 2010, 14:00 → 15:00 Europe/Zurich

30/7-012 (CERN)

The US LHC Accelerator Research Program (LARP) is developing Nb3Sn quadrupole magnets for possible use in LHC luminosity upgrade. A major milestone, set in 2005, required the achievement of 200 T/m gradient in a 4m long quadrupole, by the end of 2009, in order to demonstrate that there are no major scale-up issues with this technology. This target was met during the first test of the first Nb3Sn Long Quadrupole (LQS01) in November 2009. In a recent test, performed with improved shims and higher pre-stress, the Long Quadrupole reached 225 T/m. LQS01 is a 90 mm aperture, 4 meter long quadrupole with Nb3Sn coils made of RRP 54/61 strand (by Oxford Superconducting Technology). The two-layer coil design is based on the LARP 1m Technological Quadrupoles (TQC and TQS). The mechanical structure is based on the TQS structure implementing an aluminum shell preloaded by using bladders and keys. This talk will cover the main design features, coil development, test results, and future plans.

Slides LQ_talk_CERN_200710_V7.pdf